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围堰在水利施工中是重要的组成部分,怎样处理洪水与施工的矛盾,使导流方案经济合理、安全可靠,是水利建设者面临的一个长期课题。在北京市西北热电中心再生水管线浅埋暗挖穿越永引渠施工中,采用了桩膜围堰配合钢渡槽导流防渗施工,具有施工简单、拆除方便、可重复使用、防渗效果显著、环保等特点。以永引渠防渗导流工程为例,重点介绍桩膜围堰及钢渡槽安装施工工艺,对类似工程设计施工具有借鉴意义。
Cofferdam is an important part of water conservancy construction. How to deal with the contradiction between flood and construction so that the diversion scheme is reasonable, safe and reliable, is a long-term task for water conservancy builders. In the construction of the reclaimed water pipeline in Northwest Thermal Power Center of Beijing Municipality during the process of shallow buried tunneling through the Yonghe Drainage Canal, the piled membrane cofferdam combined with the steel aqueduct is adopted for anti-seepage construction. The utility model has the advantages of simple construction, convenient demolition, reusable effect, Environmental protection and other characteristics. Taking the seepage control and diversion project of Yongdu Canal as an example, the paper mainly introduces the construction technology of the installation of pile membrane cofferdam and steel aqueduct, which is of reference significance to the design and construction of similar projects.